Answer: I'd suggest a mix of annuals and perennials, especially this first year. The perennials take a year or two to get established and begin flowering, so the annual flowers will give you color this summer. For full sun, here are a few suggestions (there are so many to choose from!)
Perennials: Achillea, columbine, delphinium, hardy hibiscus, poppies
Annuals: gazania, calendula, portulaca, salvia 'Flare', nasturtium, sunflowers, zinnias
I hope this helps you get started!
Q&A Library Searching Tips